METHODS OF MANUFACTURING BLADES OF TURBOMACHINES BY WIRE ELECTRIC DISCHARGE MACHINING, BLADES AND TURBOMACHINES

The method is used for manufacturing a blade of a turbomachine comprising an airfoil portion; according thereto at least one external or internal surface of the airfoil portion is obtained by wire electric discharge machining; this is allowed by designing these surfaces as "ruled surfaces"...

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Bibliographische Detailangaben
Hauptverfasser:	ARCIONI, Massimo, GRILLI, Marco, GIUSTI, Enrico, CECCONI, Massimiliano
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING COMBINED OPERATIONS ENGINE PLANTS IN GENERAL HEATING LIGHTING MACHINE TOOLS MACHINES OR ENGINES IN GENERAL MECHANICAL ENGINEERING METAL-WORKING NOT OTHERWISE PROVIDED FOR NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES OTHER WORKING OF METAL PERFORMING OPERATIONS STEAM ENGINES SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL TRANSPORTING UNIVERSAL MACHINE TOOLS WEAPONS WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL
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Beschreibung
Zusammenfassung:	The method is used for manufacturing a blade of a turbomachine comprising an airfoil portion; according thereto at least one external or internal surface of the airfoil portion is obtained by wire electric discharge machining; this is allowed by designing these surfaces as "ruled surfaces" or very close to such kind of surfaces; this method is particularly effective, for forming internal cavities of hollow stator blades of steam turbines; this method allows to manufacture in a single piece hollow blades having root portions and shroud portions. Blade of a turbomachine with an internal cavity wherein the surface of the airfoil of the blade inside the cavity defines grooves perpendicular to the axis of the turbomachine.